Begin with these
Where most readers start
How to Choose an Image Upscaling Tool: A 2026 Buyer's Guide
What are the best options for everyday users to improve the quality of low-resolution images with minimal effort?
Read the guide How-toHow to Increase Image Resolution with AI
Which services provide AI-powered solutions for enlarging images while maintaining their original quality?
Follow the steps ShortlistBest Image Upscaling Tools: Our Top Picks for 2026
What are some effective methods for enhancing image quality for photographers and marketers?
Read it ExplainerImage Upscaling Tools, Explained: What They Are and How They Work
How can marketers ensure their visuals maintain a polished look when enlarging images for presentations?
Read the explainer ShortlistThe Right Image Upscaling Tool for Publishing
How can photographers upscale their images without losing quality for print and web use?
Read it Head to headAdobe Firefly vs Topaz Photo AI for increasing image resolution
How can photographers upscale their images without losing quality for print and web use?
Read itThe format
What a slider does not tell you
None of this makes comparisons useless. It makes an unlabelled one close to meaningless, and the labels are usually the missing part.
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Which crop
A demo almost always shows the region that worked. The eye, not the hair. The brick wall, not the chain-link fence behind it. One crop from one image is a sample size of one, chosen after the fact.
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Which zoom
Upscales look best at the size they were made for. Viewed at fifty per cent almost anything looks sharp; viewed at 1:1 the invented texture becomes visible. A comparison that will not let you zoom is telling you something.
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What the “before” was
A dramatic improvement usually means a badly degraded source. Downscale a sharp photo, upscale it back, and you get a flattering result that says little about what happens to a genuinely poor original.
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How many tries
Generative upscalers give a different result each run. A published before/after may be the first output or the twentieth, and nothing in the image distinguishes the two.
How much of an enlarged image is the model's guess, and why a tiny source cannot reveal detail it never held, is covered in Image Upscaling Tools, Explained.
Reading one properly
Where to actually look
In a before/after pair, the information sits in four kinds of region, and they are rarely the ones the slider opens on.
Edges between textures
Where hair meets background, or fabric meets skin. Invented detail tends to bleed across those boundaries in a way real detail does not.
Anything with writing on it
Text is the one part of an image where you can check the answer. If the letters changed, the model is guessing elsewhere too.
Flat surfaces
A wall, a sky, a cheek. These should stay smooth. Tiling seams and patchy texture show up here first because there is nothing else going on to hide them.
Repeating patterns
Brick, mesh, fabric weave. Models frequently regularise these into something neater than reality, which looks impressive and is wrong.
Read more in Topaz Photo AI Review: What It Does Well, and Where It Falls Short, Is Let's Enhance Any Good? Our 2026 Review and A Close Look at Adobe Firefly as an Image Upscaling Tool.
House rules
How this site is written
No invented numbers
No scores out of ten, no star ratings, no tier boards. Where something is better, it gets said in words and the reason is shown.
Only claims we can stand behind
Nothing describes a test that did not happen. Pricing and feature claims are checked against the vendor's own pages.
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Nothing here is sponsored, and outbound links carry no affiliate tracking and earn no commission. No company pays to be included or to be written about more kindly.
Read more in A Close Look at Adobe Firefly as an Image Upscaling Tool, Is Adobe Firefly or VanceAI the Better Image Upscaling Tool? and Topaz Photo AI Review: What It Does Well, and Where It Falls Short.
The panes at the top of this page are CSS texture, not a real before and after. There is no photograph here and nothing on this page has been measured. For two tools set against each other, read Adobe Firefly vs Topaz Photo AI or Topaz Photo AI vs Let's Enhance.
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